Cerebrovascular Disease USMLE Step 1 Practice Question
A 61-year-old woman with hypertension presents with sudden-onset vertigo, vomiting, hoarseness, and dysphagia. Vital signs: BP 168/94 mmHg, HR 88, RR 18, temp 37.2°C, SpO2 98%. She reports decreased pain sensation on the right face and left body. Exam reveals right ptosis, miosis, and ipsilateral ataxia. MRI shows acute infarction in the medial brainstem. Cranial nerve examination is otherwise intact. Which artery is most likely occluded?
Answer choices
- ABasilar artery
- BPosterior inferior cerebellar arteryCorrect answer
- CAnterior spinal artery
- DLenticulostriate arteries
- EAnterior inferior cerebellar artery
- FSuperior cerebellar artery
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